Drilling-machine.



Patented out. I4, |9o2. A. w. wlGGLEswumH.

DBILLINGVMAGHINE.

(Application led Oct. 14, 1901.) (No Model.)

2 Sheelts-Sheet I.

No. 7||,44s. Patented oct. 14,1902.

A. w. wlGeLEswonTn.

DRILLINGVMACHINE.

(A lication filed Cet. 14 1901 (No Model.) 2 Sheets-Sheet 2.

UNITED STATES yPATENT OFFICE.,

ALBERT W'. WIGGLESWORTH, OF CHICAGO, ILLINOIS.

DRILLING-NIAACHINE.

SPECIFICATION forming part of Letters Patent No. 711,448, dated October 14, 1902.

Application filed October 14, 1901.' Serial No. 78,543. (No model.)

' lowing is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon,'which form a part of this specification.

This invention relates to improvements inl drilling-machines, and refers to an improved drivingmechanism forthedrill-spindle. Said improvements are shown as applied to that class of drilling-machines shown in the prior United States Letters Patent to Dalin, No. 462,397, granted on the 3d day of November, 1891, although the improvements may bel applied to other forms of drilling-machines, as will hereinafter more fully appear. Y

As shown in the drawings, Figure 1 is a side elevation of adrilling-machine provided with a driving mechanism embodying my improvements. Fig. 2 `is aside elevation of the speed-reducing mechanism forming part of the driving mechanism, the gears and shafts of said mechanism being shown in elevation by removal of one part of the casing or shell which normally incloses the same. Fig. 3 is a central vertical section taken through said mechanism and showing the parts thereof in a position changed from that shown in Fig. 2. Fig. 4 is an end elevation of the parts shown in Fig. l. Fig. is a sectional detail taken on line 5 5 of Fig. 2.

First referring tothe improvements in the driving mechanism shown in Figs. 1 to 3, inclusive, A designates the base of the drillingmachine, and B designates a vertical tubular column rising from said base and provided at its upper end with an overhanging arm B', in the end of which is formed a vertical bearin g-aperture for the drill-spindle C. D designates a work-table bracket provided at one end with a vertical opening which passes over the column B and'which bracket carries at its outer end a work-table D. Y E-designates a drill-head which is vertically adjustable on the column and is provided on its outer end with a vertical opening, through which passes a vertically-movable spindle-bearing sleeve Vand loose pulleys F2 F3. tion-wheel affixed to the shaft F, said friction- C', which surrounds the drill-spindle. Said bearing-sleeve is provided with arackfCz, which in the complete machine forms part of the hand-actuated feeding mechanism of the drilling-machine and also part of the counterbalance mechanism.

`Now, referring to the driving mechanism and the features therein constituting my improvements, said parts are made as follows: F designates a horizontal shaft which is mounted in bearings F' F', su pported on the base A, and provided on its ends with fast wheel being non-rotative on the shaft, but endwise movable thereon. G designates as a Whole an oblique shaft which is revolubly mounted in its lower end in a bearing-sleeve F5, formed on or made integral with the bear-v ing in which the shaft F revolves. The shaft G is a sectional shaft, or, in other words, is'

made of two transversely-separated upper and lower parts vG G2,`as shown in Fig. 3. The upper end-'and middle part of said shaft are mounted in bearings B2 B3 on the column B and arm B', respectively. Saidshaft G is provided at or near its lower end with a friction-pulley G3, having a downwardly-facing conical bearingface which is adapted for engagement by the friction-pulley F4 on the shaft F. The upper endof said shaft G is provided with a beveled gear-pinion G4, which intermeshes with a beveled gear-wheel C3 on the spindle C. The friction-pulley F4 slides radially toward and from the center of the conical pulley G3 and may be actuated vby any suitable mechanism-such, for instance, as shown in the prior patent to Dalin before mentioned-whereby the speed of rotation,

F4 designates a fricand consequently the power of the drill-spindle, may be varied as desired, the speed of rotation of the shaft G being decreased and the power of the drill correspondingly in creased as the shiftable pulley F4 is moved outwardly from the center'of the pulley G3, and vice versa, as in the aforementioned prior patent to Dalin. The lower part G2 of said shaft is provided n'ear its upper end with an elongated gear-pinion G5, which is non-rotatively fixed to the shaft, as herein shown, by means of a transverse pin g, passed through the pinion and shaft in the manner shown in ICO Fig. 3. The upper part Gl of the shaft G is provided with a sleeve G, affixed non-rotatively *thereon by means of a pin g', passed transversely through the sleeve and shaft.

5 Said sleeve extends at its lower end beyond the part G of the shaft, and the extended portion of said sleeve vsurrounds the upper end of the part G2 thereof, said upper end of the part G2 of the shaft rotating in said sleeve.

Io The lower end of said sleeve G6 is provided with a gear-pinion G7, which is made of the same diameter and has alike number of teeth as the gear-pinion G5. The upper end of said sleeve G6 is provided with a gear-wheel G8,

which is made of somewhat greater diameter than the pinion G7.

H designates a short shaft which is parallel with the shaft G. Said shaft H is non-rotative and has mounted thereon a rotative 2o sleeve H', which is provided at its lower end with a gear-wheel H2, herein shown as made of the same diameter as the gear-wheel G8, and which gear-wheel G8 is adapted to mesh either with the gear-pinion G5 or with both said gear-pinion G5 and the gear-pinion G7. Said sleeve H' is also provided at its upper end with a gear-pinion I 3, shown as made of the same diameter as the gear-pinions G5 G7, and said gear-pinion H3 is adapted to mesh 3o with the gear-Wheel G8. The gears and shafts described constitute a speed-changing mechanism and is contained within and inclosed by a casing consisting of two separable parts I l', as shown more clearly in Fig. 4, which are joined by bolts t, as shown in Fig. l. On the part I of the casing is formed bearings t2 713 for the two parts G G2 of the shaft VG and guides t4 for the shaft H. Said casing is also provided with a babbitt bearing 117 for 4o the sleeve G, which carries the gear wheel and pinion GS G7, respectively. Said casing is provided with a lateral extension or arm l2, by which it is joined to the column B, said arm being connected with the column by screw-bolts i in the manner shown in Fig. l.' The sleeve H' revolves on the shaft H, but is held endwise immovable thereon between a collar h near the lower end of the shaft H and a pin h near the upper end thereof 5o passed transversely through said shaft and engaging the upper gear-pinion H3. The shaft H is endwise movable in its guides 4015 for the purpose of shifting the gear wheel and pinion H3 H2, respectively, with respect to the pinions G5 G7 and gear-wheel G6. Said shaft is locked in an adjusted position by means of a set-screw H4, which is passed through one of the lower guides i5 of the casing and impinges at its inner end against the 6o bottom of a groove h2, formed in the lower end of said shaft, which extends outside of said casing, and the interlocking of said bolt with the groove prevents rotation of the shaft. Said set-screw is provided with a radial arm or finger-piece h3, by which it is manipulated, and the lower end of the shaft is provided with a head or disk h4 for a like purpose.

When the shaft H and gear wheel and pinions H2 H3, respectively, are in their up- 7o permost positions, as shown in Fig. 2, the gear-pinion H3 is raised above and is therefore out of mesh with the gear-wheel GB, while the gear-pinion H2 intermeshes with both of the gear-pinions G5 G7. When the 75 shaft G is rotated, therefore, the gear-wheel H2 forms, in eifect, a lock between the two parts of said shaft G, so that both parts thereof rotate at the same speed and constitute,in effect,a single shaft. When said shaft H and the parts carried thereby are in their lowermost positions, as shown in Fig. 3, the gear-wheel H2 is out of mesh with the gearpinion G7 and in mesh only with the gearpinion G, while the gear-pinion H3 is in mesh with the gear-wheel GS. The two parts of the shaft G in this instance rotate at diderent speeds, the upper part of the shaft being driven through the medium of the gearwheels and pinions described from the lower part. By reason of the proportions of the gear wheels and pinions G5 GS and H2 H3 when the parts are in the positions shown in Fig. 3 the movement imparted to the upper part G of the shaft G from the lower part G2 thereof is slower than that of said lower part of the shaft, and said upper part of the shaft and connected drill-spindle will therefore be operated at a correspondingly increased power. When the parts are in the position shown in Fig. .Q -that is, when both parts of the shaft G turn togetherthe limit of the power of the machine for this adjustment is reached when the friction-pulley F4 is in contact with the part of the conical pulley G3 nearest the periphery thereof, or in the position shown in Fig. l. When doing light work, the friction-pulley F4 is moved close to the center of the conical frictionpulley G3, and the drill-spindle is therefore revolved at its highest or maximum speed. As the work becomes heavier the friction-pulley F4 is moved outwardly toward the periphery of the conical pulley, and when the extreme outer edge of said pulley is reached the limit of work of the drill is reached for the adjustment of the change-speed mechanism shown in said Fig. 2. lf it be desired to operate on heavier work, the parts of the changespeed mechanism are adjusted to the positions 4shown in Fig. 3 and locked therein. This adjustment of the change-speed mechansm operates to decrease the speed of the drill-spindle in the manner before described, and therefore increases its power for work. The friction-pulley F4 may after the adjustmentlast mentioned be moved to its innermost position on the conical pulley G3 and exert practically the same power to drive the drillspindle as was exerted thereby in the prior adjustment at the time said friction-pulley was engaged with the outermost part of said IOO IIO

conical pulley. In doing the heavier work for which the adjustment has been made the friction-pulley F4 is then adjusted to the conical pulley to produce the required speed and power, the speed being decreased and the power correspondingly increased until the friction-pulley F4 has again reached the outer limit of its movement. lVhen the frictionpulley l54 arrives at the outer limit of its movement, at a time when the adjustment of the speed-reducing mechanism is such as shown in Fig. 8, the limit of power of the drilling-machine will have been reached.

By use of the mechanism described I am enabled to greatly increase the capacity of the drillingmachine-for work, and at the same time the mechanism is so constructed as to permit the machine to do the lighter classes of work with correspondingly greater speed.

It will be understoodthat in the drawings I have omitted for the sake of clearly illus-v trating the features constituting myimprovements other features which-maybe necessary in a fully-equipped'drill and that such otherl features may be of any type desired. It will also be obvious `that many changes may be made in the structural details herein illustrated without departing from the spirit of the invention, and I do not wish to be limited to such details except as hereinafter made the subject of specific claims.

I claim as my inventionl. In a drilling-machine, the combination with a drill-spindle, a two-part, rotative driving-shaft, said shaft being operatively connected at one end with said drill-spindle, a friction-pulley connected with the other end of said shaft, a friction driving-pulley engaging the face of said friction-pulley and movable toward andfrom the center thereof, and a speed-change gear connecting the parts of said driving-shaft and operable independently ofthe friction driving-pulley, whereby the speed of the drill-spindle may be varied i by the operation of either the friction devices or the speed-change gear alone or by the combined operation thereof.

2. In a drilling-machine, the combination with a drill-spindle, of an oblique, two-part shaft rot-atively mounted in bearings in the machine-frame and operatively connected with said drill-spindle, a friction-spindle on the shaft having a conical bearing-surface, a friction driving-pulley engaging said conical pulley and movable toward and away from the center thereof, and a change-speed gear connecting the two parts of said shaft and operable independently of the friction devices,

whereby the speed of the drill-spindle may be varied by the independent operation of either the friction devices or speed-change gear or by the combined operation thereof.

3. In a drilling-machine, the combination with a drill-spindle, of an oblique, two-part shaft rotatively mounted in `bearings-in the machineframe and operatively `connected with the drill-spindle, the two parts of saidA shaft abutting end to en d inalinement with each other, a friction-pulley on the shaft having a conical bearing-surface, a friction driving-pulley engaging said conical pulley and movable toward and away from the center thereof, a fixed gear-pinion at the end of one part of said shaft, connected gear wheel and `*pinion non-rotatively mounted on the adjoining end of the other part of said shaft, the .pinions on said parts of the shaftbeing of the same diameter, a second shaft parallel with said two-part shaft, connected gear wheel and pinion rotatively mounted on said second shaft, the gear-wheel of said second shaft being adapted to mesh with one or hoth'pinions 'ently or in combination to vary the speed of the drill-spindle.

4. In a drilling-machine, the combination with a drill-spindle, of an oblique, two-part shaft rotatively mounted in bearings in the machine-frame and operatively connected with the drillspindlea friction-pulley on Said shaft having a conical bearing-surface, a friction driving-pulley engaging said conical pulley and movable toward and away from the center thereof, a fixed gear-pinion at the end of one of the parts of said two-part shaft,

asleeve fixed to the adjoining end of the other i part of said shaft and inclosing the adjoining end of the first-mentioned part of said shaft, a gear-pinion on one end of said sleeve adjacent to and of the same diameter as the firstmentioned pinion, a gear-wheel on the opposite end of said sleeve, a second shaft parallel with said two-part shaft, connected gear wheel and pinion on said second shaft, the gear-wheel of said second shaft being adapted IIO to mesh with one or both pinions of said tWopart shaft and the pinion of said second shaft being adapted to mesh with the gear-wheel of said two-part shaft at a time when the gear- Wheel of said second shaft meshes with but one of the pinions of the two-part shaft, said gear wheel and pinion of the second shaft being endwise movable for the purpose of shifting the gear wheel and pinion thereof with respect to the gear wheel and pinions of the two-part shaft, and said gear and friction mechanisms acting independently or in combination to vary the speed of the drill-spindle.

5. In a drilling-machine, the combination with a drill-spindle, of an oblique, two-partk shaft rotatively mounted in bearings on the machine -frame and operatively connected with the drill-spindle, afriction-pulley o n said shaft having a conical bearing-surface, a friction driving-pulley engaging said conical pulley and movable toward and away from the center thereof, a fixed gear-pinion at one end of one part of said two-part shaft, connected gear Wheel and pinion on the adjoining,T end of the other part of said shaft, a shaft paral lel with said two-part shaft, a sleeve rotatively mounted on said second shaft provided at one end with a gear-wheel adapted to mesh with one or both pinions of the two-part shaft and at its other end with a gear-pinion adapted to mesh with the gear-wheel of the twopart shaft at a time when the gear-Wheel of said second shaft meshes with but one of the gear-pinions of the two-part shaft, said second shaft being endwise movable in its bearings for the purpose of shifting the gear Wheel and pinion thereof with respect to the gear wheel and pinions of the two-part shaft, and said gear and friction mechanisms acting independently or in combination to vary the speed of the drill-spindle.

6. In a drilling-machine, the combination with a drill-spindle, of an oblique, two-part shaft rotatively mounted in bearings on the machine-frame and operatively connected with the drill-spindle, a friction-pulley on said shaft having a conical bearingsurface, a friction driving-pulley engaging said conical pulley and movable toward and away from the center thereof, a fixed pinion at the end of one part of said two-part shaft, connected gear Wheel and pinion on the adjoining end of the other part of said shaft, a second shaft parallel with said twopart shaft, a sleeve rotatively mounted on said shaft, provided at one end with a gear-wheel adapted to mesh with one or both gear-pinions of the two-part shaft and at its other end with a gear-pinion adapted to mesh with the gear-Wheel of the two-part shaft at a time When the connected gear-Wheel of said second shaft meshes with but one of the gear-pinions of the two-part shaft, said second shaft being` endWise movable in its bearings for the purpose of shift* ing the gear wheel and pinion thereof With respect to the gear wheel and pinions of the two-part shaft, and means for locking said second shaft in an adjusted position, coinprising a set-screw passing through the bearing of said shaft and engaging a longitudinal groove in the shaft.

In testimony that I claim the foregoing as my invention I affix my signature, in presence of two witnesses, this 10th day of October, A. D. 1901.

ALBERT W. NVIGGLES \VO RTII.

Witnesses:

WILLIAM L. HALL, GERTRUDE Enron. 

